﻿// --------------------------------------------------------------------------------------------------------------------
// <copyright file="App.xaml.cs" company="Simon Carpentier">
//   Microsoft Reciprocal License (Ms-RL)
// </copyright>
// <summary>
//   Defines the App type.
// </summary>
// --------------------------------------------------------------------------------------------------------------------

namespace VinoCellar
{
    using System.Windows;
    using System.Windows.Navigation;

    using Microsoft.Phone.Controls;
    using Microsoft.Phone.Data.Linq;
    using Microsoft.Phone.Shell;

    using VinoCellar.Model;
    using VinoCellar.ViewModel;

    public partial class App : Application
    {
        // The static ViewModel, to be used across the application.
        private static VinoViewModel viewModel;
        public static VinoViewModel ViewModel
        {
            get { return viewModel; }
        }

        /// <summary>
        /// Provides easy access to the root frame of the Phone Application.
        /// </summary>
        /// <returns>The root frame of the Phone Application.</returns>
        public PhoneApplicationFrame RootFrame { get; private set; }

        private static int CurrentDatabaseSchemaVersion = 2;

        /// <summary>
        /// Constructor for the Application object.
        /// </summary>
        public App()
        {
            // Global handler for uncaught exceptions. 
            UnhandledException += Application_UnhandledException;

            // Standard Silverlight initialization
            InitializeComponent();

            // Phone-specific initialization
            InitializePhoneApplication();

            // Show graphics profiling information while debugging.
            if (System.Diagnostics.Debugger.IsAttached)
            {
                // Display the current frame rate counters.
                Application.Current.Host.Settings.EnableFrameRateCounter = true;

                // Show the areas of the app that are being redrawn in each frame.
                //Application.Current.Host.Settings.EnableRedrawRegions = true;

                // Enable non-production analysis visualization mode, 
                // which shows areas of a page that are handed off to GPU with a colored overlay.
                //Application.Current.Host.Settings.EnableCacheVisualization = true;

                // Disable the application idle detection by setting the UserIdleDetectionMode property of the
                // application's PhoneApplicationService object to Disabled.
                // Caution:- Use this under debug mode only. Application that disables user idle detection will continue to run
                // and consume battery power when the user is not using the phone.
                PhoneApplicationService.Current.UserIdleDetectionMode = IdleDetectionMode.Disabled;
            }

            // Specify the local database connection string.
            string DBConnectionString = "Data Source=isostore:/Vino.sdf";

            // Create the database if it does not exist.
            using (VinoDataContext db = new VinoDataContext(DBConnectionString))
            {
                if (db.DatabaseExists() == false)
                {
                    // Create the local database.
                    db.CreateDatabase();

                    // Save categories to the database.
                    db.SubmitChanges();

                    // Update the schema version
                    DatabaseSchemaUpdater dbUpdater = db.CreateDatabaseSchemaUpdater();
                    dbUpdater.DatabaseSchemaVersion = CurrentDatabaseSchemaVersion;
                    dbUpdater.Execute();
                }
                else
                {
                    // Check whether a database update is needed.
                    DatabaseSchemaUpdater dbUpdater = db.CreateDatabaseSchemaUpdater();

                    if (dbUpdater.DatabaseSchemaVersion < CurrentDatabaseSchemaVersion)
                    {
                        // Columns added in version 2
                        if (dbUpdater.DatabaseSchemaVersion < 2)
                        {
                            dbUpdater.AddColumn<WineItem>("WineAppellation");
                            dbUpdater.AddColumn<WineItem>("WineCategory");
                            dbUpdater.AddTable<TasteItem>();
                        }

                        // Add the new database version.
                        dbUpdater.DatabaseSchemaVersion = CurrentDatabaseSchemaVersion;

                        // Perform the database update in a single transaction.
                        dbUpdater.Execute();
                    }
                }
            }

            // Create the ViewModel object.
            viewModel = new VinoViewModel(DBConnectionString);

            // Query the local database and load observable collections.
            viewModel.LoadCollectionsFromDatabase();
        }

        // Code to execute when the application is launching (eg, from Start)
        // This code will not execute when the application is reactivated
        private void Application_Launching(object sender, LaunchingEventArgs e)
        {
        }

        // Code to execute when the application is activated (brought to foreground)
        // This code will not execute when the application is first launched
        private void Application_Activated(object sender, ActivatedEventArgs e)
        {
        }

        // Code to execute when the application is deactivated (sent to background)
        // This code will not execute when the application is closing
        private void Application_Deactivated(object sender, DeactivatedEventArgs e)
        {
            // Ensure that required application state is persisted here.
        }

        // Code to execute when the application is closing (eg, user hit Back)
        // This code will not execute when the application is deactivated
        private void Application_Closing(object sender, ClosingEventArgs e)
        {
        }

        // Code to execute if a navigation fails
        private void RootFrame_NavigationFailed(object sender, NavigationFailedEventArgs e)
        {
            if (System.Diagnostics.Debugger.IsAttached)
            {
                // A navigation has failed; break into the debugger
                System.Diagnostics.Debugger.Break();
            }
        }

        // Code to execute on Unhandled Exceptions
        private void Application_UnhandledException(object sender, ApplicationUnhandledExceptionEventArgs e)
        {
            if (System.Diagnostics.Debugger.IsAttached)
            {
                // An unhandled exception has occurred; break into the debugger
                System.Diagnostics.Debugger.Break();
            }
        }

        #region Phone application initialization

        // Avoid double-initialization
        private bool phoneApplicationInitialized = false;

        // Do not add any additional code to this method
        private void InitializePhoneApplication()
        {
            if (phoneApplicationInitialized)
                return;

            // Create the frame but don't set it as RootVisual yet; this allows the splash
            // screen to remain active until the application is ready to render.
            RootFrame = new PhoneApplicationFrame();
            RootFrame.Navigated += CompleteInitializePhoneApplication;

            // Handle navigation failures
            RootFrame.NavigationFailed += RootFrame_NavigationFailed;

            // Ensure we don't initialize again
            phoneApplicationInitialized = true;
        }

        // Do not add any additional code to this method
        private void CompleteInitializePhoneApplication(object sender, NavigationEventArgs e)
        {
            // Set the root visual to allow the application to render
            if (RootVisual != RootFrame)
                RootVisual = RootFrame;

            // Remove this handler since it is no longer needed
            RootFrame.Navigated -= CompleteInitializePhoneApplication;
        }

        #endregion
    }
}